Sergio Martinez's trash talk was built on the premise that Julio Cesar Chavez Jr. was an unworthy and flawed middleweight champion.

Well, he was right. And he has the WBC middleweight title to prove it.

Martinez's win over the son of boxing legend Julio Cesar Chavez Sr. on Saturday night in Las Vegas exposed some major flaws in Chavez Jr.'s boxing game.

The Mexican was no match for the 37-year-old Argentine, who was more aggressive and quicker than Chavez throughout the fight. There's a reason why Chavez's 12th round knockdown didn't win him the fight: He didn't do enough in the previous 11 rounds to give Martinez a reason to stay down.

The speed was the difference, I told him to go out and exchange with him every round. I knew Martinez was good. I just didn't know how good. Chavez can do better. This was a good lesson for him. He needed to let his hands go sooner. I told him in the 10th round, he better start fighting or I was going to stop it.

Chavez looked slower and ate countless right jabs throughout the fight, rivaling a punching bag. Martinez showed the younger fighter that he has ways to go before being considered a top pound-for-pound boxer.

Chavez, 11 years younger than Martinez, looked hesitant to throw punches early on and ultimately landed his most devastating punch after the fight had been decided in the final round. Martinez was the decisive winner heading into the last few minutes.

Chavez struggled to move with Martinez and showed tremendous inexperience going up against a tricky southpaw. Sure, he has never stepped inside the ring with a lefty as skilled as Martinez, but he looked unprepared in how he dealt with jabs and body shots.

It's back to the drawing board now for Chavez. His 12th round heroics will surely have those in the boxing world clamoring for a rematch. But unless he addresses the glaring holes in his game, he won't be a threat to defeat Martinez anytime soon.

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